[Bug 111534] [CI][DRMTIP] igt at tools_test@tools_test - fail - Failed assertion: igt_system_quiet("./intel_reg dump") == 0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=111534

--- Comment #3 from Arek Hiler <arkadiusz.hiler at intel.com> ---
This is a regression caused by

commit d38950f2c0ca846816c9b0e6601181cc7e1982de
Author: Daniel Mrzyglod <daniel.t.mrzyglod at intel.com>
Date:   Thu Aug 29 15:10:37 2019 +0200

    lib/intel_mmio: add additional api for multiple devices

    Library  was limited for reading registers for only
    one device at a time in igt tests.
    Changes in this patch give as oportunity to test multiple devices in
    the same time.

    v8: pack and rename structure, remove unnecessary field
    v7: remove unnecessary code
    v6: Reword patch. Cosmetic changes.

    Cc: Antonio Argenziano <antonio.argenziano at intel.com>
    Cc: Daniele Spurio Ceraolo <daniele.ceraolospurio at intel.com>
    Cc: Katarzyna Dec <katarzyna.dec at intel.com>
    Cc: Chris Wilson <chris at chris-wilson.co.uk>
    Cc: Petri Latvala <petri.latvala at intel.com>
    Cc: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
    Cc: Jani Nikula <jani.nikula at intel.com>

    Signed-off-by: Daniel Mrzyglod <daniel.t.mrzyglod at intel.com>
    Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
    Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>

The hang:

AUD_CONFIG_DEFAULT2_REG_PORTB (0x00180000:0x00062f88): 0x00000000
AUD_CONFIG_DEFAULT2_REG_PORTC (0x00180000:0x00062f8c): 0x00000000
AUD_CONFIG_DEFAULT2_REG_PORTD (0x00180000:0x00062f90): 0x00000000
               AUD_MCTSA (0x00180000:0x00062f94): 0x00000000
               AUD_MCTSB (0x00180000:0x00062f98): 0x00000000
               AUD_MCTSC (0x00180000:0x00062f9c): 0x00000000
Segmentation fault


(gdb) bt
#0  0x00007f8d0e6b6379 in ioread32 (reg=<optimized out>, mmio=<error reading
variable: Cannot access memory at address 0x7f8d020d1000>) at
../lib/intel_io.h:77
#1  intel_register_read (mmio_data=0x7f8d020d1000, reg=reg at entry=1581312) at
../lib/intel_mmio.c:266
#2  0x00007f8d0e6c9097 in vlv_sideband_rw (mmio_data=0x7ffc27d20e18,
port=<optimized out>, opcode=opcode at entry=6 '\006', addr=32768,
val=val at entry=0x7ffc27d20d34) at ../lib/intel_iosf.c:52
#3  0x00007f8d0e6c9355 in intel_iosf_sb_read (mmio_data=<optimized out>,
port=<optimized out>, reg=<optimized out>) at ../lib/intel_iosf.c:190
#4  0x0000564ef49c9862 in read_register (config=0x7ffc27d20e10,
reg=0x564ef4c317c0, valp=0x7ffc27d20d84) at ../tools/intel_reg.c:391
#5  0x0000564ef49ca0e6 in dump_register (config=0x7ffc27d20e10,
reg=0x564ef4c317c0) at ../tools/intel_reg.c:408
#6  0x0000564ef49ca173 in intel_reg_dump (config=0x7ffc27d20e10,
argc=<optimized out>, argv=<optimized out>) at ../tools/intel_reg.c:635
#7  0x0000564ef49c8c06 in main (argc=1, argv=0x7ffc27d20fb0) at
../tools/intel_reg.c:1048

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